5 Looping with if

Now we have the basics for conditionals with if and looping with for.

Lets try to bring them together!

Real world example¶

Imagine we have read some values from a sensor and want to take action if the value is above a threshold.

In this example, we might be reading from any number of sensors such as a:

• thermometer
• volume control
• light level sensor
• earthquake sensor with an accelerometer
• tilt sensor with a gyroscope
• microphone

In [2]:

# these are the values we have read from our sensor
sensorValues = [0, 3, 5, 7, 12, 15, 27, 35, 2, 2, 2, 100]

# we define a threshold where we want to report the value
threshold = 12

for sensorValue in sensorValues:
    if sensorValue > threshold:
        print('WARNING: sensor value is above threshold', threshold, 'and has value', sensorValue)

# these are the values we have read from our sensor sensorValues = [0, 3, 5, 7, 12, 15, 27, 35, 2, 2, 2, 100] # we define a threshold where we want to report the value threshold = 12 for sensorValue in sensorValues: if sensorValue > threshold: print('WARNING: sensor value is above threshold', threshold, 'and has value', sensorValue)

WARNING: sensor value is above threshold 12 and has value 15
WARNING: sensor value is above threshold 12 and has value 27
WARNING: sensor value is above threshold 12 and has value 35
WARNING: sensor value is above threshold 12 and has value 100

In this example, we loop over each item in sensorValues and if it is greater than our threshold, we print a warning.

Tutorial¶

• Make a list of integers
• Define a threshold
• Use a for loop to loop over its items and check if each item is less-than (<) a threshold.

In [1]:

# write your code here (run your code with the run button).

# write your code here (run your code with the run button).